"If there was a grading in our system for stupidity, this behaviour would be at the very top end," Greenberg said.

However he stopped short of standing Napa down for the start of the NRL season.

"I've thought about this long and hard and I'm frustrated by the conduct and the stupidity," Greenberg said.

"I would say the length of time (ago) that it happened gives credence for me to consider the sanction.

"I'm trying to find a balance here that's fair and reasonable on the player and the club that he's playing for. Not everyone will agree with that sanction."

It's rumoured there are several other videos in circulation of NRL players performing lewd acts.

And Rugby League Central is concerned that parties that may wish to harm certain clubs will time the leaking of the videos to hit them hardest and in an effort to have a certain player stood down.

Therefore the NRL chose to impose a fine, rather than sanction Napa.

However, Greenberg said that if a player appeared in a crude video that was made at any point in the future, they could expect to be stood down.

"I would suggest that every NRL player would be acutely aware now that if they distribute or take videos which are idiotic, senseless and juvenile and distribute them around and it gets out, they can expect a significant sanction," Greenberg said.

Bulldogs chief executive Andrew Hill said the club accepted the NRL's sanctions and hoped to draw a line under the episode.